Cyclic phosphonates

Details Cyclic phosphonates Cyclic phosphonates

C - Chemistry, Metallurgy

07

F

402/353, 154/45,

C07F 9/40 (2006.01) C07F 9/6571 (2006.01) C08G 79/04 (2006.01) C08K 5/52 (2006.01) C08K 5/5333 (2006.01) C09J 185/02 (2006.01)

Patent

CA 1054621

ABSTRACT Alcohols preferably having a pKa below that of propanol-1 are heated with certain heterocyclic phosphites to give phosphonates and certain heterocyclic phosphonites, to give phosphinates. If small amounts of alcohols are employed, the products are generally polymeric in nature whereas if larger amounts of the alcohol are employed, there is generally ring opening and isomerization to the phosphonate or phosphinate. The products are useful as fire retardants and as adhesives for glass. Pentaerythritol phosphite can be self-polymerized by such heating to form the adhesive polymer.

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